<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>背景固定</title>
    <style>
        body{
            height: 2123px;
        }
        .box1{
            width: 200px;
            height: 100px;
            background-image: url(http://climg.mukewang.com/58dc9d360001d65806500650.jpg);
     overflow: scroll;
            background-attachment: }
    </style>
</head>
<body>
    <div class="box1">
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div>
    <div>内容</div></div>
</body>
</html>